Window sash lock



Sept 12 1950 J. J. KENNEDY 2,521,796

wINnow sAsH Locx Filed Jan. 5, 1948 IN VEN T 0R.

.la/1 Z fa/Marly BY Q0 c. WAL

Patented Sept. 12, 1950 UNITED s'rA'rEs PATENT yorricr:

assises WINDOW ssen Loox .mm J. Kennedy. Richmond m11, N. Y. Application January 5.1948, serial No. sse

s claims. (ci. zoe-e7) The present invention relates to locks for' windows having upper and lower sashes. and more particularly to an improved lock for locking the sashes in closed position. as well as in a plurality of selected open positions to regulate the amount of ventilation.

An object of the present invention is to provide a window lock of the foregoing type which is simple and inexpensive in construction and cannot be tampered with to gain unlawful access through the windows to which it is applied.

Another object is to provide a window lock of the foregoing character wherein the locking means thereof are adapted to be retained in predetermined interlocking and released positions. .i Another object is to provide a window lock of the foregoing type wherein the locking bolt is indexed in a position for movement into and out of the slot in its keeper.

Another object is to provide a window lock of the foregoing type which is particularly adapted for all forms of sashes now generally used.

A further object consists in the construction and arrangement of elements of the window lock whereby the foregoing objects are accomplished;

Other and further objects will be obvious upon an understanding of the illustrative embodiment about to be described. or will be indicated in the appended claims, and various advantages not referred to herein will occur to one skilled in the art upon employment of the invention in practice.

A preferred embodiment of the invention has been chosen for purposes of illustration and description and is shown in the accompanying drawing. forming a part of the speciilcation. wherein:

Figure l is a fragmentary sectional view of a window having upper and lower sashes, illustrating a window lock in accordance with the present invention applied thereto. parts of the lock being shown in plan;

Figure 2 is a sectional view taken substantially along theline 2-2 on Figure 1, illustratingthelockinapositiontolockthesashes; y

Figure 3 is a sectional view taken along the line l-I on Figure 2; t

Figure 4 is a fragmentary elevational view. illustrating the lock in a released position whereby the sashes are freely movable with respect to each other: and

Il'igureisaplanviewofthelockasshown in Figure 4, with the upper sash shown in section.

Referring to the drawing in detail. there is shown a portion of a window having an upper i sash I0 and a lower sash Ii. For purposes of illustrating and describing the present invention, only one side rail i2 and the lower rail Il.

of the upper sash and-only the upper rail I4 of the lower sash are shown.

The side rail I2 has an inner face i5. substantially perpendicular to the pane of the window. 'to which is secured a keepex` member It in the form of a right angle strip. The strip has a flange I1 which is secured by screws I8 or the like to the inner face and has a ange Il formed with a plurality of vertical slots 2B spaced one above the other. As shown, the flange il is disposed in a plane substantially parallel to the window pane and extends upwardly from the lower rail i3 whereby the window sashes may be locked in closed position by utilizing the lowermost slot.

The upper rail N of the lower sash has a plate 2l secured thereto adjacent the side rail l2. by screws 426 or the like. An L-shaped rod has a leg 21. which is secured to the plate at 2l, and has another leg 29, which extends horizontally towards the ange i8 of the strip in alignment with the slots 20 formed in the flange (Figure 3). Bolt means 30 are slidably and rotatably mounted on the leg 29, as described hereinafter.

The plate further has arr-upwardly extending bridge portion 3i, preferably stamped therefrom, forming a projection or stop and providing a horizontally extending opening (Figures 2 and 3) serving as locking means .for cooperating with locking means formed on the bolt means, aa described hereinafter. The plate also has a pair of vertical spaced apart posts 32 and 34 mounted thereon, the function of which will become apparent from the following description.

The bolt means 30 comprises a tubular body portion I5 telescoped over the leg 2U for rotatable and slidable movement thereon.

tures I0 and into which the posts 32 and Il are adapted to extend, respectively. for retaining the bolt means against slidable movement in predetermined inward and outward positions. The post 32 has a cam-faced recess I3 (Figures 2 and 4) for receiving a portion of the handle to I' T-shaped head I6 formed onk onev end of the r atain the same in an inclined position (Figure 2).

The flange 39 is formed with a projection 42. shown in the shape of a saw tooth, adapted to extend under the bridge portion Il and cooperate therewith to serve as locking means (Figure 2). The ilange 39 also has a recess M adapted to receive the bridge portion 3| and rotatably align the tubular portion of the bolt means to index the T-shaped head for movement into and out of the slots 29.

In operation, when it is desired to have the sashes in unlocked relation for relative movement therebetween. the bolt means are slid on the leg 29 away from the keeper member to a position where the handle portion 91 can be moved downwardly to a position which causes the post 34 to extend into the aperture Il (Figures 4 and 5). With the elements so arranged. the bolt means is locked against accidental sliding movement while in an inactive position. I

When it is desired to lock the sashes while the window is fully closed, that is. in the position best illustrated in Figure 3, the handle portion 31 is moved upwardly to the position shown in broken lines in Figure 4, with the recess M receiving the bridge portion 9|. This effects rotation of the T-shaped head oi the boit means to index the same in the position whereby it can be moved into one of the slots 29, in this instance the lowermost slot. When the bolt head extends into this slot, the handle portion is moved downwardly to rotate the bolt head and position it in the keeper slot in interlocking relation. (Figure 3.) It is to be noted that in the locked position the bottom rail i3 of the upper sash and the top rail il of the lower sash are drawn towards each other, thereby also sealing the sashes against wind passage during cold periods. As the handle portion is moved downwardly towards the position shown in Figure 2, the cam-face on the post 92 guides the post through the aperture il and indexes the projection 42 for movement into the opening formed by the bridge portion 3|. The bridge portion and the post 32 further serve to wedge the handle portion therebetween, to thereby clamp the bolt means in a manner'to prevent slidable movement and easy rotation thereof, if an attempt is made to tamper with the locked window from the exterior.

'I'he sashes are unlocked by reversing the foregoing described procedure, mainly by raising the handle portion to index the bolt head, withdrawing the bolt and moving the handle portion downwardly to the position shown in Figures 4 and 5.

In the event it is desired to lock the sashes in a position so that the window is partly open for regulated ventilation. the lower sash is raised or the upper sash is lowered and the bolt means is again operated in the foregoing described manner, whereby the head of the bolt means cooperates with any selected keeper slot 29 above the lowermost slot.

From the foregoing description it will be seen that the present invention provides a window looking device which is simple and inexpensive in construction. practical and reliable in operation, resists all forms of tampering from the exterior of the window to render the window burglar proof, and is adapted for use in connection with all forms o! sliding sash constructions. The parts of the lock are ruggedin construction and can readily withstand any rough usage to which the lock may be subjected.

As various changes may be made in the form. construction and arrangement of the parts herein, without departing from the spirit and scope of the invention and without saericing any oi' its advantages. it is to be understood that all matters are to be interpreted as illustrative and not in any limiting sense.

I claim:

1` A lock for a window having an upper sash. a lower sash, and a keeper member with a slot.- which member is adapted to be secured to a side rail oi the upper sash. comprising a plate adapted to be secured to an upper rail of the lower sash adjacent the keeper member. said plate having locking means thereon. bolt means slidably and rotatably mounted on said plate for movement` towards and away from said keeper member, said bolt having a head adapted to cooperate with said slot to lock the sashes, and locking means on said bolt means adapted to be moved into engagement with said locking means of said plate upon rotation of said bolt means to lock said bolt means against slidable movement.

2. A lock according to claim l, wherein said locking means of said plate is formed with a horizontally extending opening and said locking means on said bolt means is in the form oi a projection adapted to extend into said opening.

3. A lock according to claim '1, wherein said bolt means has a manually engageable operating arm formed with an aperture and said plate has an upwardly extending post adapted to extend into said aperture to retain said bolt means against slidable movement.

4. A lock according to claim 1. wherein said bolt means has a manually engageable operating arm formed with a pair of apertures and said plate has a pair of upwardly extending posts each adapted to extend into one of said apertures to retain said bolt means against slidable movement in an inward and an outward position, respectively.

5. A lock according to claim 1, wherein said locking means of said plate is formed with an upwardly projecting portion and said bolt means is formed with a recess adapted to receive said projecting portion to index said bolt head in a :position to move inwardly and outwardly of said slot.

JOI-IN J. KENNEDY.

REFERENCES CITED The following references are of record in the ille of this patent:

Umm STATES PATENTS Germany July 29, 1939 

